烟羽消白冷凝器的设计与实验研究

湿法脱硫燃煤电厂烟气中含有大量的水蒸气,形成具有视觉污染的白色烟羽。在脱硫塔后加装烟气冷凝器,可以消除白色烟羽、回收大量水资源,同时还可以进一步降低烟气中的污染物含量。针对Colburn-Hougen方法传质方程中j因子需要通过查表来获得的繁琐性,基于菲克定律和传热传质类比定律,推导出了一个传质系数Kv。利用获得的Kv,采取逐段计算的方法设计了烟气冷凝器,并进行了实验验证。结果表明:设计计算结果与实验结果非常接近,可以采用Kv计算水蒸气的冷凝速率,采用逐段计算方法设计烟气冷凝器。

Design and Experimental Research of the Condenser for Smoke Plume Elimination

The flue gas of wet desulfurization coal-fired power plant contains a large amount of water vapor,which forms a white smoke plume with visual pollution.Installing a flue gas condenser after the desulfurization tower can eliminate white smoke plumes,recover a large amount of water resources,and further reduce the content of pollutants in the flue gas.In view of the cumbersomeness of the factor j in the mass transfer equation of the Colburn-Hougen method that needs to be obtained by looking up the table,based on Fick''s law and the heat and mass transfer analogy law,a mass transfer coefficient Kv is derived.Using the obtained Kv,the flue gas condenser was designed by the section by section calculation method,and the experimental verification was carried out.The results showed that the design calculation results are very close to the experimental results.The Kv can be used to calculate the condensation rate of water vapor and the section by section calculation method can be used to design flue gas condenser.